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Future Circular Collider (FCC) Study

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Presentation on theme: "Future Circular Collider (FCC) Study"— Presentation transcript:

1 Future Circular Collider (FCC) Study
FCC Kick-Off 2014 Future Circular Collider (FCC) Study Michael Benedikt, Frank Zimmermann

2 Outline Motivation & scope Parameters & design challenges
Preparing global FCC collaboration Study organization – WBS Study Time Line, next steps EU FCC design study proposal Summary

3 Summary: European Strategy Update 2013
Design studies and R&D at the energy frontier ….“to propose an ambitious post-LHC accelerator project at CERN by the time of the next Strategy update”: d) CERN should undertake design studies for accelerator projects in a global context, with emphasis on proton-proton and electron-positron high-energy frontier machines. These design studies should be coupled to a vigorous accelerator R&D programme, including high-field magnets and high-gradient accelerating structures, in collaboration with national institutes, laboratories and universities worldwide.

4 CLIC CDR and cost study (2012)
3 volumes CDR: physics & detectors, accelerator complex, strategy, cost & schedule Collaborative effort: 40+ institutes worldwide

5 Future Circular Collider Study - SCOPE
CDR and cost review for the next ESU (2018) Forming an international collaboration to study: pp-collider (FCC-hh)  defining infrastructure requirements e+e- collider (FCC-ee) as potential intermediate step p-e (FCC-he) option km infrastructure in Geneva area ~16 T  100 TeV pp in 100 km ~20 T  100 TeV pp in 80 km

6 FCC motivation: pushing energy frontier
High-energy hadron collider FCC-hh as long-term goal Seems only approach to get to 100 TeV range in the coming decades High energy and luminosity at affordable power consumption Lead time design & construction > 20 years (LHC study started 1983!)  Must start studying now to be ready for 2035/2040 Lepton collider FCC-ee as potential intermediate step Would provide/share part of infrastructure Important precision measurements indicating the energy scale at which new physics is expected Search for new physics in rare decays of Z, W, H, t and rare processes Lepton-hadron collider FCC-he as option High precision deep inelastic scattering and Higgs physics Most aspects of collider designs and R&D non-site specific. Tunnel and site study in Geneva area as ESU requests.

7 Main areas of FCC design study
Infrastructure Hadron collider conceptual design Hadron and lepton injectors Lepton collider conceptual design Safety, operation, energy management environmental aspects Accelerators and infrastructure conceptual designs High-field magnets Superconducting RF systems Cryogenics Specific technologies Planning Technologies R&D activities planning Hadron coll. physics experiments interface, integration e+ e- coll. physics experiments interface, integration e- - p physics, experiments, Interface, integration Physics experiments detectors

8 FCC-hh parameters – starting point
Energy TeV c.m. Dipole field ~ 16 T (Nb3Sn), [20 T option HTS] Circumference ~ 100 km #IPs 2 main (tune shift) + 2 Luminosity/IPmain 5x1034 cm-2s-1 Stored beam energy 8.2 GJ/beam Synchrotron radiation 26 W/m/aperture (filling fact. ~78% in arc) Long. emit damping time 0.5 h Bunch spacing 25 ns [5 ns option] Bunch population (25 ns) 1x1011 p Transverse emittance micron normalized #bunches Beam-beam tune shift (total) b* m (HL-LHC: 0.15 m) already available from SPS for 25 ns

9 FCC-hh design challenges
Optics and beam dynamics IR design, dynamic aperture studies, SC magnet field quality Impedances, instabilities, feedbacks Beam-beam, e-cloud, resistive wall, feedback systems design Synchrotron radiation damping controlled blow up, luminosity levelling, etc… Energy in beam & magnets  dump, collimation, quench protection Stored beam energy critical: 8 GJ/beam (0.4 GJ LHC) Beam losses, radiation effects  collimation, shielding Synergies intensity frontier (SNS, J-PARC, PSI, PIP, FRIB, ESS, FAIR) High synchrotron radiation load on beam pipe Up to 26 W/m/aperture in arcs, total of ~5 MW for FCC-hh (LHC has a total of 1W/m/aperture from different sources) Heat extraction: photon stop, beam screen temperature, cryo load, Synergies with SSC,VLHC, LHC, light sources, SppC, …

10 High-field magnet R&D targets
FCC-hh baseline 16T Nb3Sn technology for ~100 TeV c.m. in ~100 km Develop Nb3Sn-based 16 T dipole technology, with sufficient aperture (~40 mm) and accelerator features (field quality, protectability, cycled operation). In parallel conductor developments Possible goal: 16T short dipole models by 2018 (America, Asia, Europe) Possible goal: demonstrate HTS/LTS 20 T technology in two steps a field record attempt to break the 20 T barrier (no aperture), and a 5 T insert, with sufficient aperture (40 mm) and accel. features In parallel HTS development targeting 20 T: HTS insert, generating O(5 T) additional field in large aperture O(100 mm, 15 T)

11 FCC-ee parameters – starting point
Design choice: max. synchrotron radiation power set to 50 MW/beam Defines the maximum beam current at each energy 4 physics operation points (energies) foreseen Z, WW, H, ttbar Optimization at each operation point, mainly via bunch number and arc cell length Parameter Z WW H ttbar LEP2 E/beam (GeV) 45 80 120 175 105 L (1034 cm-2s-1)/IP 28.0 12.0 5.9 1.8 0.012 Bunches/beam 16700 4490 1330 98 4 I (mA) 1450 152 30 6.6 3 Bunch popul. [1011] 0.7 0.47 1.40 4.2 Cell length [m] 300 100 50 79 Tune shift / IP 0.03 0.06 0.09 0.07

12 FCC-ee design challenges
Short beam lifetime from high luminosity (radiative Bhabha scattering) Top-up injection (single injector booster in collider tunnel) Additional lifetime limit from beamstrahlung at top operation energy Flat beams (small vertical emittance, small vertical b* ~ 1 mm) Final focus with large (~2%) energy acceptance to reduce losses Machine layout for high currents, large #bunches at Z pole, WW, H Two ring layout and configuration of the RF system. Polarization for high precision energy calibration at Z pole and WW with long natural polarization times (WW: ~10 hours, Z: ~200 hours) Important expertise available worldwide and potential synergies: IR design, experimental insertions, machine detector interface, (transverse) polarization RHIC, VEPP-2000, BEPC-II, SLC, LEP, B- and Super-B factories, CEPC, ILC, CLIC

13 SC-RF main R&D areas SC cavity R&D
Large 𝑸 𝟎 at high gradient and acceptable cryogenic power Recent results at 4 K with Nb3Sn coating on Nb at Cornell 800 ℃ ÷1400 ℃ heat treatment at JLAB Beneficial effect of impurities observed at FNAL Relevant for many other accelerator applications High efficiency RF power generation from grid to beam Power converter technology Klystron efficiencies beyond 65%, alternative RF sources as Solid State Power Amplifier or multi-beam IOT (inductive output tube), etc. Relevant for all high power accelerators, intensity frontier (drivers): J-PARC, SNS, nstorm, LBNE, XFEL, μcoll, ESS, MYRRHA, … Overall RF system reliability  relevant for FCC-hh and FCC-ee R&D Goal is optimization of overall efficiency, reliability and cost! Power source efficiency, low-loss high-gradient SC cavities, operation temperature vs. cryogenic load, total system cost and dimension.

14 FCC-he parameters – starting point
Design choice: beam parameters as available from hh and ee Max. e± beam current at each energy determined by 50 MW SR limit. 1 physics interaction point, optimization at each energy collider parameters e± scenarios protons species e± (polarized) p beam energy [GeV] 80 120 175 50000 luminosity [1034cm-2s-1] 2.3 1.2 0.15 bunch intensity [1011] 0.7 0.46 1.4 1.0 #bunches per beam 4490 1360 98 10600 beam current [mA] 152 30 6.6 500 sx,y* [micron] 4.5, 2.3

15 FCC-he design challenges
Integration aspects, machine detector interface Synchrotron radiation Large polar angle acceptance IR optics & magnets with 3 beams Crossing scheme Detector integrated dipole, final SC quadrupoles, crab cavities, Concurrent operation of e±h with hh or/and e+e- operation? Relevant expertise available worldwide and potential synergies: HERA, eRHIC, MEIC, HIAF-EIC,… Alternative option for eh collisions in connection with FCC-hh: Potential reuse of an energy recovery linac (ERL) that is being studied in the frame of the LHeC study.

16 FCC global design study preparation
Following ESU in May 2013, creation of a small preparation group in autumn 2013 to prepare on a short time scale: preliminary draft baseline parameter sets for all options a possible work breakdown structure and study organisation an international kick-off meeting (now!) Kick-off event should start process of internat. collaboration presenting preparatory work as basis for discussion  draft parameter sets & WBS documents available inviting feedback and suggestions working towards formation of a global design study collaboration integrating all aspects of machines, physics and detectors Reflected in kick-off meeting programme.

17 International collaboration process in 2014
Proposal for next steps: Suggestions and comments from international community and discussion on study contents, organisation and resources Invitation of non-committing expressions of interest for contributions from worldwide institutes by end May 2014 Prepare for formation of International Collaboration Board (ICB); proposed date first meeting 9-11 September 2014, to start FCC study March April May June July August September 2014 kick-off event expressions of interest (EOI) proposed 1st ICB meeting discussions iterations Process can be moderated by preparation group (possibly extended – following EOI) until global collaboration is formed and an international team is put in place to conduct the further study Process remains open, further joining possible …

18 FCC Kick-Off & Study Preparation Team
Future Circular Colliders - Conceptual Design Study Study coordination, M. Benedikt, F. Zimmermann Hadron collider D. Schulte Hadron injectors B. Goddard e+ e- collider and injectors J. Wenninger Infrastructure, cost estimates P. Lebrun Technology High Field Magnets L. Bottura Supercon-ducting RF E. Jensen Cryogenics L. Tavian Specific Technologies JM. Jimenez Physics and experiments Hadrons A. Ball, F. Gianotti, M. Mangano e+ e- A. Blondel J. Ellis, P. Janot e- p M. Klein e- p option Integration aspects O. Brüning Operation aspects, energy efficiency, safety, environment P. Collier Planning (Implementation roadmap, financial planning, reporting) F. Sonnemann, J. Gutleber

19 Proposal for FCC WBS top level

20 WBS – lower level example: FCC-ee study
Draft work packages and units International contributors and convenors needed for technical areas and study organisation

21 Proposed international organization structure
CERN DG Collaboration Board 1 person/inst. Steering Committee 2-3 persons/region Advisory Committee 1-2 experts/field FCC Study Coordination Hadron Collider Physics Experiments Lepton Collider Physics Experiments e-p Physics Experiments Accelerators Hadron Injectors Hadron Collider Lepton Injectors Lepton Collider Accelerator R&D Technologies Infra-structures Operation Costing Planning

22 Proposal for FCC Study Time Line
2014 2015 2016 2017 2018 Q1 Q2 Q3 Q4 Prepare Kick-off, collaboration forming, study plan and organisation Ph 1: Explore options “weak interaction” Workshop & Review identification of baseline Ph 2: Conceptual study of baseline “strong interact.” Workshop & Review, cost model, LHC results  study re-scoping? Ph 3: Study consolidation Workshop & Review  contents of CDR 4 large FCC Workshops distributed over participating regions Report Release CDR & Workshop on next steps

23 Possible FCC Study Phases
Phase 1: Explore options, now – spring 2015: Investigate different options in all technical areas, taking a broad view Deliverables: description and comparison of options with relative merits/cost FCC workshop to converge to common baseline with small number of options Proposed WS date 23 – 27 March 2015 (presently no known collisions…) Followed by review ~2 months later, begin June 2015 Phase 2: Conceptual design: spring 2015 – autumn 2016 Conceptual study of baseline and remaining options with iterations between all areas Deliverable: description of baseline with first cost model, identification of critical areas, cost drivers, performance limitations FCC workshop to discuss conceptual design, performance and cost figures Proposed date autumn 2016. Followed by review 2 months later to take into account LHC results and do re-scoping of study for phase 3 Phase 3: Study consolidation: winter 2016 – winter 2017 Detailed conceptual design of re-scoped baseline Deliverables: description of re-scoped baseline with cost model, identification of critical areas, cost drivers, performance limitations, planning for further R&D activities FCC workshop to discuss conceptual design, performance and cost figures and contents for CDR editing. Proposed date autumn 2017. Followed by review 2 months later to confirm CDR contents Phase4: Editing conceptual design report: winter 2017 – summer 2018

24 FCC EU Design Study (DS) Proposal
Horizon2020 call – design study, deadline Prepare proposal parallel to FCC collaboration setup Goals fo EU DS: conceptual design, prototypes, cost estimates, … From FP7 HiLumi LHC DS  positive experience: 5-6 work packages as sub-set of FCC study ~10-15 beneficiaries (signatories of the contract with EC) kick-off event input from interested partners, end of May submission of EU FCC DS proposal, 2 Sept. discussions iteration, agreements, signatures March April May June July August September 2014 complete draft proposal, end of June Time line Non-EU partners can join as beneficiary – signatory with or w/o EC contribution (contractual commitment) or as associated partner – non-signatory (in-kind contribution with own funding, no contractual commitment)

25 FCC Study - Summary In line with the European Strategy, CERN is launching a 5-year international design study for Future Circular Colliders; Worldwide collaboration in all areas - physics, experiments and accelerators – is essential to reach CDR level by 2018. FCC R&D areas e.g. SC high-field magnets and SC RF are of general interest & relevant for many other applications. Significant R&D investments have been made over last decade(s), e.g. in the framework of LHC and HL-LHC; further continuation will ensure efficient use of past investments. Goals of kick-off meeting: Introducing FCC study, discussing study scope and organization, preparing and establishing collaboration! Invitation to join!

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